Inviscid Burgers equation with random kick forcing in noncompact setting

We develop ergodic theory of the inviscid Burgers equation with random kick forcing in noncompact setting. The results are parallel to those in our recent work on the Burgers equation with Poissonian forcing. However, the analysis based on the study of one-sided minimizers of the relevant action is different. In contrast with previous work, finite time coalescence of the minimizers does not hold, and hyperbolicity (exponential convergence of minimizers in reverse time) is not known. In order to establish a One Force --- One Solution principle on each ergodic component, we use an extremely soft method to prove a weakened hyperbolicity property and to construct Busemann functions along appropriate subsequences.Comment: 58 pages. This is an extension of work in arXiv:1205.6721 to the kick-forcing setting. In this version, instead of Kesten's concentration inequality, the more basic Azuma--Hoeffding inequality is used in Section

Solutions of semilinear wave equation via stochastic cascades

We introduce a probabilistic representation for solutions of quasilinear wave equation with analytic nonlinearities. We use stochastic cascades to prove existence and uniqueness of the solution